QUARRIES IN CUMBERLAND COUNTY. 79 
quarry, recurs at distances of 3 to 30 feet. The rift is horizontal and 
the grain is vertical, extending east-west. There are a few knots, 
up to 12 inches across, of muscovite, quartz, and feldspar. There is 
no sap. 
The plant consists of 3 derricks, 1 hoisting engine, and 3 polishers. 
Transportation is by cartage, one-half mile to railroad or three- 
fourths mile to dock. In 1905 the quarry was idle. 
The fine texture of the stone makes it particularly well adapted for 
monuments. It has found its way chiefly into Massachusetts and 
the West. Among the monuments made of it are the Humboldt 
monument in Chicago and the Scott monument in Pittsburg, Pa. 
The front of the Maine building at the Chicago World's Fair, after- 
wards removed to Poland Springs, Maine, and the polished tanks at 
Poland Springs also came from this quarry. 
The Pownal Granite Company's quarry is in the southern corner 
of the town of Pownal, 2J miles north-northeast of Yarmouth junc- 
tion on the Maine Central and Grand Trunk railroads. Operator, 
Pownal Granite Company, No. 1 Madison avenue, New York. 
The granite (specimen 123, a) is a biotite granite of light-gray 
shade and very fine, even-grained texture, most of the particles 
ranging from 0.25 to 0.75 mm. in diameter. It consists, in descend- 
ing order of abundance, of very slightly smoky quartz, potash 
feldspar (microcline), soda-lime feldspar (oligoclase), and black 
mica with accessory zircon, apatite, and magnetite. The oligoclase 
is much altered to a white mica and the microcline has intergrowths of 
quartz, circular in cross section. The polish is inferior to that of 
the Freeport stone. 
The quarry, opened in 1880, measures 300 by 200 feet, and averages 
(3 feet in depth. There are from 2 to 3 feet of clay and soil stripping. 
Rock structure : Flow structure at one point results in a lamination 
dipping 10° east, with thin black streaks of matted biotite scales. 
The sheets measure from 4 inches to 4 feet 8 inches in thickness and 
pip 10°-15° SE. in broad undulations. They have been tested 
with core drills to a depth of GO feet and the lowest sheets found 
'Xo be 6 feet thick. Vertical joints, striking N. 50° E., recur every 
BO or 35 feet. The rift is horizontal and the grain is vertical, ex- 
tending east-west. A 12-inch basic dike crosses the northwest half 
lf)f the quarry with a course N. 50° E. A 1-inch pegmatite dike, 
tvith ferruginous staining, strikes N. 80° E. and dips 20° SE. 
ilnother, 4 inches thick, occurs at the west end of the quarry, dip- 
Ding 10° W. There are neither knots nor rust stains nor sap. 
I The plant consists of 4 derricks, 2 engines, 2 steam drills. 1 steam 
|»ump, 1 compressor with a capacity of 80 cubic feet of air per minute, 
| pneumatic hand tools, 1 surfacer. The cutting plant is in New 
ork. 
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